unexposed
/ˌʌnɛksˈpoʊzd, ˌʌnɪg-/Definitions
1. adjective
not exposed or subjected to the elements; not revealed or made known
“The unexposed film in the camera needed to be developed before it could be viewed.”
2. noun
a part of a photograph that has not been exposed to light
“The unexposed areas of the photograph were still hidden in the shadows.”